When I went to urinate I had a sharp pain, and it felt like my urine pushed passed a blockage. At the end, a few drops of blood came out. It was as if I scraped a booger that had dried to the inside of my nose out and it bled.I did jerk off earlier today, could it have been dried semen, or another worse problem? The blood was very normal in color, looked like the source was very near the tip. It only lasted about thirty seconds, and there is no pain now.